Specifications

Dialogic
®
DSI SS7HD Network Interface Boards Programmer's Manual Issue 11
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4.4 MTP Interface Messages
MTP interface messages allow signaling links to be activated and deactivated by the
user and provide a mechanism for communication between the MTP3 module and the
user part module (for example, ISUP, TUP or SCCP). In many cases, the user part
module is an Dialogic® SS7 Protocol so the user does not need to handle the MTP
primitives as they pass directly between MTP3 and the user part module.
In the case that the user application is implementing the user part functionality, the
MTP primitives are applicable. See the MTP2 Programmer’s Manual and the MTP3
Programmer’s Manual for more information.
The messages in the MTP interface category include:
• API_MSG_RX_IND - MTP Transfer Indication
• API_MSG_RX_INDT - Timestamped Incoming Signaling Unit Indication
• API_MSG_TX_REQ - MTP2 Transmission Request
4.4.1 API_MSG_RX_IND - MTP Transfer Indication
Synopsis
Message generated by MTP2 when operating in monitoring mode.
Format
MESSAGE HEADER
Field Name
Meaning
type
API_MSG_RX_IND (0x8f01)
id
l3_link_id/upper_id
src
MTP2 module ID/ATM module ID
dst
Links upper module ID/user module ID
rsp_req
0
hclass
0
status
0
err_info
0
next
0
len
Number of octets in the Signaling Unit
PARAMETER AREA
Offset
Size
Name
0
len
Signaling Unit (SU) data in binary format.
Description
Message generated by MTP2 when operating in monitoring mode.
Parameters
The MTP_MSG_RX_IND message includes the following parameter: